export default {
	namespaced:true,
	
	state: () => ({
		// cart:JSON.parse(uni.getStorage('cart') || '[]' )
		 cart: JSON.parse(uni.getStorageSync('cart') || '[]')
	}),
	
	mutations:{
		addToCart(state,goods){
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			if(!findResult){
				state.cart.push(goods)
			}else{
				findResult.goods_count++
			}
			this.commit('m_cart/saveToStore')
		},
		// 更新购物车中商品的勾选状态
		updateGoodsState(state, goods) {
		  // 根据 goods_id 查询购物车中对应商品的信息对象
		  const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
		
		  // 有对应的商品信息对象
		  if (findResult) {
		    // 更新对应商品的勾选状态
		    findResult.goods_state = goods.goods_state
		    // 持久化存储到本地
		    this.commit('m_cart/saveToStore')
		  }
		},
		updateGoodsCount(state,goods){
			 const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
		  if(findResult){
			findResult.goods_count = goods.goods_count
			this.commit('m_cart/saveToStore')
			 }
		},
		removeGoodsById(state,goods){
			state.cart = state.cart.filter(x => x.goods_id !== goods.goods_id)
			this.commit('m_cart/saveToStore')
		},
		updateFullChecked(state,newVal){
			state.cart.forEach(x => x.goods_state = newVal)
			this.commit('m_cart/saveToStore')
		},
		saveToStore(state){
			 // console.log(uni.setStorageSync('cart',JSON.stringify(state.cart)))
			 uni.setStorageSync('cart',JSON.stringify(state.cart))
			 // console.log(res)
			 
		}
		
	},
	
	getters:{
		total(state){
			let c = 0
			state.cart.forEach(x => c += x.goods_count)
			return c
		},
		// 选中的商品总数量
		checkedCount(state){
		return	state.cart.filter(x => x.goods_state).reduce((total,item) => total += item.goods_count,0)
		},
		// 选中的商品总价格
		checkedPrice(state){
		return	state.cart.filter(x => x.goods_state).reduce((price,item) => price += item.goods_count * item.goods_price, 0).toFixed(2)
		}
	}
}